Something to consider: If you're on the move during the day and camped at night, that doesn't give you any time to charge anything with solar power. And if you're deep in a canyon, you might get stuck in a shaded area. Might not be enough voltage to get you powered up.

Perhaps think of ways to reduce the amount of power needed. Leave the computer behind and bring enough SDHC cards or SxS cards to avoid having to transfer footage, and bring along a power source to just charge the batteries. Have enough batteries available to cover your needs just in case you can't get a full charge during the day.

Other options: Carry enough batteries and SDHC cards to cover you for the duration of the trip without having to bring a power supply (30 batteries?!). Or see if there's any way to drag a portable power supply (a 28-pound Honda EU1000 generator) and a few gallons of gas.